Improvement in machines for pressing soles



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Machines'for Pressing Soles.rr

910,136,706, Y f PatentedMarchH,1873.

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UNITED STATES FREDERICK W. COY, OF EAST CAMBRIDGE, ASSIGNOR TO WILLIAM BUT- TERFIELD, OE BOSTON, AND CHARLES KENISTON, OF SOMERVILLE,

MASSACHUSETTS.

lMPuROl-EMENT IN MACHINES FOR PRESSlNG SOLES.

Specification forming part of Letters Patent No. 136,70G, dated March 1l, 187:5.

To all whom it may concern:

Be it known that I, F. W. COY, of East Cambridge, in the county of Middlesex and accompanies and forms part of this specification, is a descriptionot my invention sui'cient to enable those skilled in the art to practice it.

The invention'relates particularly to an arrangement of mechanism for operating the platen of that class ot' presses in each of which an upper beam constitutes the bed, against which the direct pressure is exerted, the platen being forced up vtoward this bed by suitable toggle-levers, or by screw or other mechanism. In my invention I employ, instead of a togglelevcr mechanism, an arrangement of gear and roll mechanism, embodying the advantage of the lever mechanism as to the` relative speed of movement and power at required times Without the disadvantages resulting from and inseparable from a great number ot' pivotal connections, such as is found in toggle-lever' presses. For this purpose I extend from the movable platen-beam (sliding upon vertical;

rods) two bearings, supporting the opposite ends of a short shaft, upon which, between the bearings, is an eccentric or cam gear, having side rims that rest and roll upon corresponding rims of a driving-gear pinion, whose shaft rotates in stationary bearings. While the Weight of the eccentric and the stress exerted upon it is resisted by the rim-surfaces the rotation is effected by the intermeshing gear-teeth. upon which teeth no strain comes except the leverage and lateral strain required to operate the platen. The relation o f the center ot' the eccentric and the centerof its rotation to the movements 'of the platen is such that the rapid movement of the platen is etfected during the first part of the rise of the platen, while as the platen is approaching the completion of its ascent, and is, of course, completing its work, and has to apply the greatest strain, its movement is slow, but is practically effected by the action of the small gear upon the part of the eccentric gear of greatest diameter. This construction, which primarily constitutes my invention, makes an'exceedingly strong and enduring p;ess, and a very simple and inexpensive one, and it has for small work, like pressing and molding shoe-soles',

6to., important advantages over any press now made. In connection with such press I prefer to use upon the platen a slide that moves to the forward part ot' the platen for :accessibility when the platen is descending, and back under the bed-beam as the platen starts up for the action of the press, and this sliding niotion I impart automatically, so that as the platen descends the slide moves to the front With the pressed work, and into position for easy removal vof such work and its replacement by'material to be pressed, while as the platen starts up the slide is moved back to bring the work under the bed-beam, this provision constituting a part of my invention.

The drawing represents a machine embodying my invention.

Figure l shows the press 'in front elevation. Fig. 2 is a sectional elevation.

a denotes a strong stand, thetwo uprights of which are connected by a stationary beam, b. Through and above the uprights extend rods c, bolted to the uprights, and upon these rods is iixed the cross-beam d, which forms the bed toward which the platen lnoves, and against which the pressure is exertiV d. Under this beam is the platen-beam e, made with sleeves f,that slide upon the rods c, the platen having extending down from it the bearings g, in which is supported a shaft or shaft-pin, h, that carries a cam or-eocentric gear, c'. The gear-Wheel t' rests upon a gear-pinion wheel, k; but, instead of the gear-teeth resting directly upon the pinion-teeth, the wheel is made Witha rim, l, on each side of the gear-teeth, and-the pinion-wheel with a similar rim, m, on each side of its teeth, and the rims l rest and roll directly on the rims m, while the motion of the eccentric is imparted by the meshing ofthe teeth of the pinion with those of the eccentric. The pinion-wheel is fixed on a driving-shaft, a, mounted and rotating in stationary bearings o on the top of the cross-beam b,

and as the shaft is turned the eccentric firstA throws up the platen with arapid motion, and next with a slow motion, but with suficient power to practically exert the most efficient or greatest pressure upon the material to be pressed between the platen e and the bed d, the resistive strain coming not upon the gearteeth, and not upon the shaft-pin h, or bearings g, but upon the shaft n and bearings o, which bearings are extensions from the main and stationary beam b. The rims not only serve as rollers, but they strengthen the gearteeth to resist the lateral strain upon them. Under the upper beam d is shown a die, p, and upon the platen e is a correspondingly or reversely shaped mold-plate, g, shaped for forming soles. The platen-die or mold-plate is preferably fixed on a slide-plate, r, which has a capability of forward-and-back sliding movement upon the platen to bring the die or mold into position for removal or application of the material pressed or to be pressed. To

this slide is jointed one arm, s, ofua lever, t, Whose other arm, u, extends into a cam groove, 0, on one side of the eccentric gear-wheel, this cam being so formed that the platen-slide is automatically drawn to the front as the platen descends, and then under the beam d as the platen begins to rise.

I claimt 1. In combination with the movable platen e, the eccentric gear-wheel t and gearpinion 7c having roller-rims Z m, substantially as shown and described.

2. In combination with fue movable platen e, the platen-slide r', automatically moved to the front, and vice versa, substantially as described.

FREDERIOK W. COY.

Witnesses:

FRANCIS GoULD, S. B. KIDDER. 

